Home / 759.25-1,139.07-272.30

Finding the Fourth Proportional to 759.25, 1,139.07 and 272.30

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Solution

The fourth proportional to 759.25, 1,139.07 and 272.30 is: 408.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.25 : 1,139.07 = 272.30 : x
  2. Step 2: Convert to fraction form
    759.25/1,139.07 = 272.30/x
  3. Step 3: Cross multiply
    759.25x = 1,139.07 × 272.30
  4. Step 4: Simplify right side
    759.25x = 310,168.76
  5. Step 5: Solve for x
    x = 310,168.76/759.25
  6. Step 6: Final answer
    x = 408.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.